Assionob



R. F. REHL.

mmm comusnow ENGINE.

APPLICAUON mso APR, 1. 1911.

Patented Nov. l1, 1919.

Ge/a R. F. ROEHL.

mERNAL comusloN ENGINE.

APPLICATION FILED APR. 7. |91?. Patented NOV. 11,

2 SHEETS-SHEET 2.

ILLINOIS KOTOR, COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION Ol' ILLINOIS. INTEBHAL-COHBUSTION ENGINE.

To all @cham it may concern:

Be it known that I, RICHARD F. Rom, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Internal- Combustion Engines, of which the following is-a specification. A

My invention has reference .to an improved two cycle internal combustion engine, the same bein especially designed for use as a motor cyc e engine and having as one of its principal objects to improve the construction .and increase the eiliciency and utility of engines of this type. Another object of the invention is to provide an engine 1n whichexcessive s ds are attained and maintained with per ect quietness of action, and without liability of miss-fire or base explosion. A still further object is the provision of a novel construction ofvmanifold and piston controlled by-pass operating to create pressure in the manifold in vthe downstroke of the piston and thereby aid in unseating the valve in the end inlet-port of the cylinder.

My invention also contemplates certain `novel details of construction, combination and arrangement of parts of the improved engine, whereby ce 'n advantages are attained, as will be more fully described hereinafter, and pointed out in the claims. These, together with such otherobjects as may hereinafter appear, or are incident to my invention, I attain by means of a construction illustrated in preferred form in the accompanying drawings, wherein Figure 1 represents a central vertical 1ongitudinal section of my improved engine';

Fig. 2 is a viW of the engine in perspective, the manifold ,being dissociated from the cylinder proper;

Figs. 3 and 4 the manifold;

Fig. 5 represents a view in perspective of a fragmentary portion of the cylinder and illustrating the ports leading to the port chamber; and

Fig. 6 is a view ported piston.

Referring to the drawings, the reference numeral 7 desi ates the cylmder which is formed with radiating iins 8, and provided with a suitable igniting device 9 carried in the head 10 of the cylinder. Associated with the lower portion 7 of the cylinder 7 are front an-d rear views of in perspective of the Speemeation o! Letters Patent. p appunti mea apra 1, ma semi no.' 100,301. "f

A in der v trol the inflow of gas Patented Nev. 11, 191e.

is a crank-case 11 provided with a fly-wheel 12 and crank shaft 13, the latter oonnected by a piston rod 14 with a piston 15 adapted for reciprocative movement in the cylinder. Above and below the piston head are the working and compression chambers 16 and 17, respectively.

At the upper end of the working 6 is an end outlet port 18 controlled b a back check valve 19, and at the lower end of the same is a series of exhaust ports 20 and a series 4of oppositely disposed open side inlet orts 21, the exhaust ports being so locate and formed as to exhaust in the downstroke of the piston prior to or simultaneously with the admission of gas through the side inlet ports past the deliecting 4portion 22 of the piston head 15l into the working chamber.

Formed A1n the side wall of the lower cylrtion 7* is a series of rte 23 disposed 1n vertical alinement wit and below the series of side inlet ports 21, but spaced apart therefrom by the interv web rtion 7" of the cylinder, (see Fig. I e

chamber ywall of the cylinder isalso exten ed outwardly to constitute a port chamber 24 or casing for the ports 21 and 23, there being a connecting passage 25 or by-pass between the said ports and a Asingle o 26 whose mouth at the u per end of the pa 25 is in substantie. alinement with the ends of the fins 8 in one direction and with the ports 21 in the other direction, the lower end of the p being closed.

About the' open 18 and 26 are llangcs 27, 28, provided with stud screws .27 and 28, respectively, adapted to pus through openings formed in the corresponding ianges 29, 30, of the manifold 31, ,and by means of nuts coperat' -with said screws the manifold is design to be secured in position a 'nst the cylinder, and straddl'ing the iils, 'as in the manner shown in his manifold has a centrall enlar ed portion 32 formed in its outer ace wit a charge intake opening 37 threaded to receive the valve casing 33 of the back check valve 34, which latter is designed to conoin any suitable carburetor or other charge forming device, and to revent the new charge from being forced y ack into the carbureter upon the downstroke of the piston. Both valves 19 a central enlarged chamber formed with a valved intake opening, and provided terminally with branch ducts of relativel smaller diameter detachably connected with the outer -port of said gas chamber and said end inlet port, and a valve for the end inlet port having a lesser diameter than the valve for the intake opening.

3. In an internal combustion engine, the combination of a cylinder having a working chamber provided with an end inlet port, a compresion chamber in the lower part thereof provided with an outwardly projecting gas chamber having inner and outer ports, a piston in said cylmder, a valve for said inlet port provided with a spring for holding it closed, substantially throughout the downstroke of the piston, a charge conducting manifold connecting the outer port of the gas chamber with said inlet port to form a walled passage therebetween and provided with an enlarged intake chamber, and a sprin -held intake valve movable in said intake c amber and having a diameter greater than the diameter of said plassage, said piston ported near the head of t e comression chamber to communicate with the intake of the manifold throu h the ports of the gas chamber substantiay throu hout the upstroke of the piston, and sai gas chamber and manifold constituting an extension of the compression chamber for conducting gas during the greater part of the piston movement.

4. In a motor-cycle engine c cle crank compression type,

of the twothe combinatlon of a cylinder having a working cham ber provided in its head with an end inlet port, a compression chamber in the lower part thereof provided with a gas chamber aving inner and outer ports, a piston in said cylinder at the head of the compression chamber, a valve for said inlet port provided with means for yieldingly holding it closed substantially throughout the downstroke of the piston, a charge conducting manifold lovided with a seat for said valve and detac ably connecting the outer port of the gas chamber with said inlet port to form a walled passage therebetween, said manifold provided in the wall of said passage above said outer port with an intake having a diameter greater than that of the said outer port, a valve seated in said intake and opening into said passage near said inlet port and forming part of the wall of said passage, said piston ported to communicate with the intake of the manifold through the ports of said gas chamber and said passage substantially throughout the upstroke of the piston.

5. An internal combustion engine cylinder havin in combination, a working chamber provi ed with an end inlet port, a piston in said cylinder, a charge conducting manian intake manifold having an fold associated at one end with said port and provided with an intake valve, and a compression chamber having an outer gas chamber, the latter being provided with a passage communicating with the other end of the manifold, said assage serving as a gas conductor substantially throughout the cycle of piston movement and havin a. cross-sectional area less than that of eit er the intake valve or said outer gas chamber.

6. An internal combustion engine c linder having, in combination, a wor ing chamber provided with an end inlet port, a piston in Said cylinder, a compression chamber having an outer gas chamber provided with an outer gas port, a valve for holding said inlet port closed substantially throughout the downstroke of the iston, and a charge conducting manifold) detachably connected at its ends with said inlet port and said outer gas port and provided intermediately thereof with an intake chamber and an intake valve therefor, the cross-secti'onal area of said outer gas port being less than that of either of the intake valve or said outer gas chamber, and both of said valves being carried by said manifold and detachable therewith.

7. An internal combustion engine cylinder having in combination, workin and compression chambers and provide with an outer gas port, a piston in said cylinder, said workin chamber having an end inlet port and said compression chamber provided with an enlarged chambered passage leading therefrom to said outer as rt,

intake c amber and a gas intake port therefor and provided with a valve for the end inlet port and a valve for the intake port, said assage communicating with the intake c amber through said gas port in the downstroke and npstroke of the piston and said gas port having a cross-sectional area less than that of the said chambered passage.

8. An internal combustion engine cylinder having, in combination, a working chamber provided with a valved inlet port, a piston in said cylinder, a compression chamber, an outer as chamber, the wall of the cylinder porter? to permit communication between the outer gas chamber and the compression chamber substantially throughout the cycle of piston movement, a manifold having a gas intake chamber and an intake valve therefor, said manifold positioned between the outer gas chamber and said inlet port and constituting with said outer gas chamber a chambered gas induction and storage passage during such piston movement, a part of said passage between the outer gas chamber and the intake valve being constructed to act as a suction zone for said valve.

9. An internal combustion engine having,

lot

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